Crank for fitness equipment with self-locking mechanism

ABSTRACT

A crank for fitness equipment with a self-locking mechanism is provided. A crank body is provided with an installation hole, an internal thread is disposed in the installation hole, and an anti-loosening ring embedding portion is disposed at an outer end of the installation hole. An anti-loosening ring is tightly fitted to the anti-loosening ring embedding portion. A screw rod of a pedal is screwed into the installation hole of the crank body, and passes through the anti-loosening ring tightly fitted in the installation hole.

BACKGROUND Technical Field

The disclosure relates to a fitness equipment, and in particular to acrank structure of an exercise bike and a spin bike. The crank structurehas the function of locking a pedal and a crank.

Description of Related Art

Currently, as shown in FIG. 1 and FIG. 2 , in a locking structure of apedal 10 and a crank 20 of an exercise bike and a spin bike on themarket, the pedal 10 has a screw rod 11, and the crank 20 has a screwhole 21. The screw rod 11 is screwed into the screw hole 21 and extendsout of the screw hole 21. On the outside of the crank 20, a locking nut30 is screwed to a portion of the screw rod 11 extending out of thescrew hole 21 to lock the pedal 10 onto the crank 20. The issue with thelocking structure is that the crank 20 does not have the function of aself-locking structure, and the locking nut 30 needs to be screwed tothe portion of the screw rod 11 of the pedal 10 extending out of thecrank 20 on the outside of the crank 20, which not only occupies a largespace, but also has a complicated appearance and structure, and theassembly efficiency of the pedal 10 and the crank 20 is low, and thelocking function of the pedal 10 and the crank 20 is not ideal.

SUMMARY

The disclosure provides a crank for fitness equipment with aself-locking mechanism, which does not require additional locking of ananti-loosening nut, solves the issue of difficulty in assembling a pedaland a crank through a simple structure, is easier to operate, andensures stable locking between the pedal and the crank; and reduces thespace occupied by the pedal and the crank after assembly, so that theappearance of the product is neater, thereby enhancing the goodexperience of the user for the product.

In order to achieve the above objective, the disclosure adopts thefollowing technical solutions.

-   -   According to an embodiment of the disclosure, a crank for        fitness equipment with a self-locking mechanism includes a crank        body, an anti-loosening ring and a pedal. The crank body is        provided with an installation hole, wherein an internal thread        is disposed in the installation hole, and an anti-loosening ring        embedding portion is disposed at an outer end of the        installation hole. The anti-loosening ring is tightly fitted to        the anti-loosening ring embedding portion. The pedal includes a        screw rod. The screw rod is screwed into the installation hole        of the crank body, and passes through the anti-loosening ring        tightly fitted in the installation hole.

In the crank for fitness equipment with the self-locking mechanismaccording to an embodiment of the disclosure, the anti-loosening ring isa metal anti-loosening ring or a plastic anti-loosening ring.

In the crank for fitness equipment with the self-locking mechanismaccording to an embodiment of the disclosure, the metal anti-looseningring is riveted to the anti-loosening ring embedding portion in theinstallation hole of the crank body.

Compared with the prior art, the technical solutions provided by thedisclosure has the following beneficial effects.

Firstly, the crank for fitness equipment with the self-locking mechanismof the disclosure adopts the anti-loosening ring built into theinstallation hole of the crank body to tighten the screw rod passingthrough the anti-loosening ring, thereby locking the pedal onto thecrank to prevent loosening.

Secondly, the screw rod of the disclosure passes through theanti-loosening ring and is automatically tightened by the anti-looseningring, so that the pedal can be automatically locked onto the crankwithout the need for an external locking nut, which is convenient tooperate and greatly reduces the assembly difficulty to achieve easyassembly; and the anti-loosening ring fastened in the crank can furtherimprove the locking effect of the crank and the pedal.

Thirdly, the anti-loosening ring of the disclosure is built into thecrank, which occupies less space to save more space, and enables theappearance of the crank and the pedal after assembly to be neater,thereby enhancing the good experience of the user for the product.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understandingof the disclosure and constitute a part of the disclosure. The exemplaryembodiments of the disclosure and the descriptions thereof are used toexplain the disclosure and do not constitute any improper limitation tothe disclosure.

FIG. 1 is a schematic diagram 1 of a locking structure of a pedal and acrank of an exercise bike and a spin bike in the prior art.

FIG. 2 is an exploded view of FIG. 1 .

FIG. 3 is a three-dimensional structural schematic diagram of a crankand a pedal after assembly according to the disclosure.

FIG. 4 is a cross-sectional structural schematic diagram of the crankand the pedal after assembly according to the disclosure.

FIG. 5 is a three-dimensional exploded structural schematic diagram of acrank for fitness equipment with a self-locking mechanism according tothe disclosure.

FIG. 6 is an A-A cross-sectional structural schematic diagram of FIG. 5.

FIG. 7 is a main structural schematic diagram of the crank for fitnessequipment with the self-locking mechanism according to the disclosure.

FIG. 8 is a B-B cross-sectional structural schematic diagram of FIG. 7 .

FIG. 9 is an enlarged structural schematic diagram of a portion K ofFIG. 8 .

DETAILED DESCRIPTION OF DISCLOSED EMBODIMENTS

In order for the technical issues, technical solutions, and beneficialeffects of the disclosure to be clearer and more comprehensible, thedisclosure will be further described in detail below with reference tothe drawings and the embodiments. It should be understood that thespecific embodiments described herein are only used to explain thedisclosure and are not used to limit the disclosure.

In the claims, the specification, and the above drawings of thedisclosure, unless otherwise clearly defined, terms such as “first”,“second”, or “third” are used to distinguish different objects, ratherthan to describe any specific order.

In the claims, the specification, and the above drawings of thedisclosure, unless otherwise clearly defined, terms indicatingorientations or positional relationships, such as “center”, “lateral”,“longitudinal”, “horizontal”, “vertical”, “top”, “bottom”, “inside”,“outside”, “up”, “down”, “front”, “rear”, “left”, “right”, “clockwise”,and “counterclockwise”, are based on the orientation and the positionalrelationship shown in the drawings, and are only for the convenience ofdescribing the disclosure and simplifying the description, rather thanindicating or implying that an indicated device or element must have aspecific orientation or be constructed and operated in a specificorientation, so the terms should not be construed as limiting thespecific protection scope of the disclosure.

In the claims, the description and the drawings of the disclosure,unless otherwise explicitly defined, if the term “fixed connection” or“fixedly connected” is used, it should be understood in a broad sense,that is, any connection method without displacement relationship andrelative rotation relationship between the two, that is, includingnon-removable fixed connection, removably fixed connection, connected asa whole, and fixed connection through other devices or components.

In the claims, the specification, and the above drawings of thedisclosure, the terms “including” and “having” and the variationsthereof refer to “containing but not limited to”.

In conjunction with FIG. 3 to FIG. 9 , a crank for fitness equipmentwith a self-locking mechanism of the disclosure is described, whichincludes a crank body 100 and a pedal 200, and further includes ananti-loosening ring 300.

The crank body 100 of the disclosure is provided with an installationhole 110, an internal thread 111 is disposed in the installation hole110, and an anti-loosening ring embedding portion 112 is disposed at anouter end of the installation hole 110.

The anti-loosening ring 300 of the disclosure is tightly fitted to theanti-loosening ring embedding portion 112 in the installation hole 110of the crank body 100. The anti-loosening ring 300 is fastened in thecrank body 100, which further enhances the locking effect of the crankbody 100 and the pedal 200, and the anti-loosening ring 300 is builtinto the crank body 100, which occupies a small space, and the overallappearance is neater after assembling the crank body 100 and the pedal200, which further enhances the good experience of the user for theproduct.

The anti-loosening ring 300 may be a metal anti-loosening ring or aplastic anti-loosening ring. The metal anti-loosening ring is riveted tothe anti-loosening ring embedding portion 112 in the installation hole110 of the crank body 100.

The pedal 200 of the disclosure includes a pedal body 210 and a screwrod 220. One end of the screw rod 220 is fixedly connected to the pedalbody 210, and the other end is screwed into the installation hole 110 ofthe crank body 100 and passes through the anti-loosening ring 300tightly fitted in the installation hole 110, so that the anti-looseningring 300 tightens the screw rod 220 to prevent loosening. The disclosurecan automatically lock the pedal 200 onto the crank body 100 without theneed for an external locking nut, which is not only easy to operate, butalso greatly reduces the difficulty of assembly, and ensures stablelocking between the pedal 200 and the crank body 100.

During installation, firstly, the anti-loosening ring 300 is tightlyfitted to the anti-loosening ring embedding portion 112 installed in theinstallation hole 110 of the crank body 100. Then, the screw rod 220 ofthe pedal 200 is screwed into the installation hole 110 until the screwrod 220 passes through the anti-loosening ring 300, so that theself-locking assembly of the pedal and the crank can be completed toachieve easy assembly.

The foregoing description shows and describes the preferred embodimentsof the disclosure. As previously mentioned, it should be understood thatthe disclosure is not limited to the form disclosed herein, and shouldnot be regarded as an exclusion of other embodiments, but may be used invarious other combinations, modifications, and environments, and can bemodified within the scope of the inventive concept described hereinthrough the above teachings or skill or knowledge in the related art.However, modifications and changes made by persons skilled in the art donot depart from the spirit and scope of the disclosure, and should fallwithin the protection scope of the appended claims of the disclosure.

What is claimed is:
 1. A crank for fitness equipment with a self-lockingmechanism, comprising: a crank body, provided with an installation hole,wherein an internal thread is provided in the installation hole, and ananti-loosening ring embedding portion is provided at an outer end of theinstallation hole; an anti-loosening ring, tightly fitted to theanti-loosening ring embedding portion; and a pedal, (comprises a screwrod, wherein the screw rod s screwed into the installation hole of thecrank body, and passes through the anti-loosening ring tightly fitted inthe installation hole.
 2. The crank for fitness equipment with theself-locking mechanism according to claim 1, wherein the anti-looseningring is a metal anti-loosening ring or a plastic anti-loosening ring. 3.The crank for fitness equipment with the self-locking mechanismaccording to claim 2, wherein the metal anti-loosening ring is rivetedto the anti-loosening ring embedding portion in the installation hole ofthe crank body.